How the h**l do i. how the h**l do i change the now snapped band on the DC07? It has defeated 2

Question

how the h**l do i change the now snapped band on the DC07? It has defeated 2 reasonable intelligent and practical people! ideas very welcome. The band appears to go through a slot in the bottom of the machine onto a spindle but we can not work out how to get at the spindle to put the band over it.